Waste gate actuator - Saab 9000 Bulletin Board - Saabnet.com
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Waste gate actuator
Posted by Tapani (more from Tapani) on Tue, 6 Aug 2002 05:41:57
In Reply to: Overboost revisited..., AdamB
[Profile/Gallery]
, Tue, 6 Aug 2002 05:11:26
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Adam,
Measure the mm of preload you have on your actuator. If it exceeds 2mm, your actuator spring is weak and you need to replace the actuator.
Too much physical preload will limit the travel (stroke) of the actuator and this might cause your problem.
I had huge boost spikes like you describe with the original actuator and 0.4 bar base boost. The preload was around 3.5 mm and there was not enough stroke left for compensating. A new actuator solved my problem, though I still have to adjust the base boost a bit below spec to keep everything cool. This means, that an uprated actuator might be a good thing to try.....?
Regards,
Tapani
-94 CSE 2.3 FPT CC stg 1
posted by 193.110.3...
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